By mixing different quantities of just three basic colors- red, green, and blue -virtually any color of the visible spectrum can be produced. Utilizing efficient LED lights in their heads, these creatures can be custom-tuned to suit your mood or the moment. On the torso are three knobs, one each for red, green, and blue, allowing you to brighten and dim any of the three, or combine them to make yellows, oranges, purples, whites, etc. The limbs are comprised of extendable antennas, and flex to allow a number of custom poses. Uses 3 AA batteries.